A fresh water marsh is a type of ecosystem. Grasses fish wading birds frogs and alligators live together in fresh water marshes. Pieces of decaying material sink to the bottom of the marsh. Which is the best answer ot describe wehre carbon can be found in the marsh?
in the atmosphere and water only
in living things and decaying material only
in the atmosphere, water, living things and decaying material
in living things only

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.